I only really reread my favs nowadays and poetry's one of those arts where the people who are considered good are usually pretty friggin' good (except Marianne Moore; she stinks), so I don't have many less famous poets I'd bother recommending and especially not to someone who hasn't read most of the below first. From your list, Blake, Rimbaud and Verlaine would make my top 50 for sure. I'm not really a Beats guy, but I get it.
Firstly, if you ever get in the mood for dem Romantic boys, read everything by Keats, Byron, Shelley, Coleridge and Wordsworth, because they were all goddamned geniuses. But only if you're in the mood for it.
Wallace Stevens (my favorite poet; fav poetry book too (Harmonium); start with "The Snow Man' and if it hits you like it does me then read everything he ever wrote, including his essays)
Yeats (believe the hype; hard to top his best poems)
WH Auden (annoyingly rewrote tons of his stuff; stick with the originals)
Hart Crane (not easy; I'd say don't just dive into "The Bridge," although I kinda dare you too at the same time)
TS Eliot (not easy either, mostly because he read every book in every language, and expects that you did too; Prufrock before Wasteland, obvs)
Ezra Pound (don't start with The Cantos!)
H.D. (I reckon my favorite female poet, but you gotta like classical)
Emily Dickinson (I still don't know how she came up with this stuff)
Elizabeth Bishop (if you like "One Art" you'll love her)
Robert Frost (respect the formality! probably the easiest to love major poet)
Thomas Hardy (I'm a sucker for his love poems to his wife)
Theodore Roethke (nature, man)
John Berryman (you'd love The Dream Songs; Nick Cave does!)
Howard Nemorov (pick and choose; he varies)
Donald Justice (likewise)
James Merrill (genius, but tread carefully, cuz genius)
Adrienne Rich (dive into the wreck)
Seamus Heaney (hell yeah more Irish!)
some war poets like Wilfred Owen, Randall Jarrell, Edward Thomas (kinda) and Siegfried Sassoon are great too if you're up for that.